Bottom door for dump-wagons.



C. G. STREICH. BOTTOM DOOR FOR DUMP WAGONS. APPLICATION FILED 001.2.1914.

1,144,389. Patented June 29, 1915. v

ayoM

THE NORRIS PETERS CO.. Pj IOTO-LITHQ, WASHINGTON. D C.

' To all whomz't may concern:

a door type it has been the practice heretofore i so CHARLES G. STREICH,OF OSHKOSH, WISCONSIN.

BOTTOM DOOR FOR DUMP-WAGONS.

Specification of Letters Patent.

Patented June 29, 19115.

Application filedOctober 2, 1914. Serial No. 864,553.

Be it known that I, CnAnLns G. STREIOH, a citizen of the United States,and resident of Oshkosh, in the county of Winnebago and State ofWisconsin, have invented cer tain new and useful Improvements in BottomDoors for Dump-Wagons; and I do hereby declare that the following is afull, clear, and exact description thereof.

My invention refers to dump wagons of the swinging bottom type and hasfor its object to provide simple, economical and effective means forobviating thetendency of the bottom door to bind in its swingingmovement, provision for eliminating such bind being a peculiarity of theconstruction of a hinge member, which member also permits the door toswing upon ZLfiXGd axis coincident to a closing movement.

- In dump wagons of the swinging bottom to construct the hingeconnections between the body of the wagon and the bottom doors withsufficient play to permit the doors when swung downwardly to a dumpingposition to move upwardly in a vertical position with relation to thedumped load, this loose fit being essential in order to prevent bindingof the swinging and vertically reciprocative door member. Hence, inpractice, it has been found that with the loose shackle or hingeconnections used the play ofthe pintle member with relation to itsknucklemember is such that the do0rs,when swung to a closing positionwill frequently bind or not efiect a tight joint at their free edges andit is the purpose of my present invention to overcome this objectionablefeature and the feature wherein the door is liable to cramp when drawnupward in a vertical direction.

With the above objects in view the invention consists in certainpeculiarities of construction and combination of parts as set forthhereinafter with reference to the accompanying drawings and subsequentlyclaimed. a

In the drawings Figure 1 represents a rear portion of a dump wagonhaving hinge members attached thereto for the bottom doors embodying thefeatures of my invention and an anti-friction device made in accordancewith my invention that is adapted to engagethe wheel-rim or tire whenthedoors are swung open or vertically lifted from their open position,and Fig. 2,21, cross-section of the same, the section being indicated byline 22 of Fig. 1.

Referring by characters to the drawings, 1 represents the body of a dumpwagon, 2 the rear axle, and 3' one of the rear wheels, it beingunderstood that in practice the vehicle is preferably provided withdouble bottom doors 3, 3, as indicated in Fig. 2 of the drawings, thatare adapted to close at a longitudinal dividing line midway of the body.The doors have secured thereto apertured straps 4 adjacent to their endsand at an intermediate point, in which strap apertures are mountedrevoluble bolt-pintles 5, each of which normally rests at the base of apair of slots 6. These slots are formed in companion rail members 7,that are vertically disposed to constitute part of a bracket 8, each ofthe same being bolted or otherwise secured to the side walls of thewagon body adjacent to their bottom edges. The base of each bracket slot6 is in axial alinement with a series of such brackets, whereby theseveral pintle bolts, under normal conditions, are correspondinglyalined, attention being called to the fact that the pintle bolts are ofsuch diameter as to snugly fit the walls of the slots and, when at restin the base sockets, their lower circular faces are nested in thecorresponding circular bases of the slots, whereby play of the pintlesis only had in a vertical direction. The slotted rails 7 are, as stated,vertically disposed and project outwardly from the side Walls of thewagon and the sides of the companion rails are tapered upwardly fromtheir base portions.

In order to strengthen the outer free ends of the bottom doors each ofthe same is provided with an angle-iron reinforcing strap 9, which isvertically disposed as shown, and secured to the projecting web of eachstrap is a bracket 10 formed with apertured ears which are connected bya trunnion 11 and loosely mounted upon the trunnion is a revolubleanti-friction member in the form of a roller 12, the outer face of whichroller projects beyond its carrying bracket 10 to form a revoluble rubmember adapted to engage the inner face of the juxtaposed wheel-rim ortire. As shown in Fig. 1, the anti-friction roller is of such lengththat its rear end will come in contact with the tire or rim of thejuxtaposed rear wheel when the door is swung downward, being held insuspension will cause the doors to be forced outwardly.

This movement is limited by engagement of the anti-friction roller 10with the wheel rim or tire near the ground line. The movement of eachdoor is controlled by a runner 13 which is anchored in any suitablemanner to the rear portion of the wagon, as shown in Fig. 1. Each runnerso anchored is passed through roller guides 13 and intermediate loopguides 13", with which the free edgeof the door is provided. Fromthence, as shown in Fig. 1, the runner or chain 13 passes upward andover'a guide roller 13 that is suitably supported ina bracket at theforward end of the body and from this point each runner 13 passes over awinding drum 14. Hence when the chains or runners are wound up they willcausethe doors to swing to the position as shown in Fig. 2 of thedrawings and when the operating mechanism is released the said doors arefree to swing downwardly, as shown in Fig. 1. It is obvious that, whenthe doors are swung open in the position shown in Fig. 1, should it bedesired to move the wagon forward clear of the dump, although greatpressure of the doors against the rear wheels is had, this pressure willnot form a brake for said wheels due to the fact that the rollers 12will revolve coincident to rotation of said wheels, whereby the vehiclecan be drawn clear of the load without exerting unnecessary power andthis power under ordinary conditions wherein the antifriction mechanismis not present is frequently so great as to overtaX the draft ani- Vmals. The doors, when swung to their open position, as shown in Fig. 1,are usually withdrawn or lifted vertically by manipulating the runners13, whereby said doors are caused to move upward upon the outer faces ofthe wagon body sides. The longitudinally disposed slots 6 in the railmembers 7 will permit this movement and the doors will thereby be drawnupwardly and, during the upward lift of the same, it is apparent thatthe anti-friction rollers 12 will travel upon the curved face of thewheelrim or tire throughout the movement due to the length of saidrollers.

As mentioned in the summing up of the objects of my invention, althoughthe controlling runners for lifting the doors may be centrally disposedwith relation to their length, the frictional resistance of the dumpupon the inner faces of the rollers will frequently cause one end of adoor to lift in advance of the opposite end and this skewing or obliquerise of the doors under ordinary conditions will cause a cramp betweenthe pintle member and the knuckle member, whereby, the door isabsolutely locked to resist pull of the runner connected thereto. Shouldthis cramping occur in a wagon equipped with rails having tapered sides,as shown, it is obvious, as indicated by the dotted line w, should theforward end of the door lift. first, the tapered side walls of the railswill thus present a clearance space for the strapheads and pintle bolts5, whereby binding of the pai'vt'sis eliminated and hence, even thoughthe forward end of the door should initially lift in advance of the rearend, there is no bind between the hinge members and the door willeventually be withdrawn .to assume a vertical position with the pintlesat the top ends of the rail slots. r

While I haveshown a wagon body provided with a seriesof three bracketmembers each having a pair of slotted rail members, the side wallsofwhich are tapered upwardly, it is obvious that I may, withoutdeparting from the spirit of my invention, use only two or more of suchbrackets for each door or the bracketsmay be made with single railmembers tapered andslotted in accordance with my invention, under whichconditions'the" head of the strap member maybe bifurcated to straddlethe rail or it may be set to one side thereof with a pintle extendingthrough therail slot.

It is apparent from the foregoing descrip tion that the pintle boltsbetween their heads areof a length equal to the distance between theoutside faces of the rail members-at their wide base ends. Thus when thedoor is lifted, with one end describing an are relative to the companionpintle, the tilted pintle upon a higher plane will have clearance, dueto the converging side walls of the rails, the same result beingaccomplished by the lift of the knuckle ther'ebetween and as the boltsare loosely mounted within the strap apertures, they constitute rollersin effect to eliminate friction and wear when they travel back and forthin the 115 12. The combinationwith a dump wagon having a body,wheel's'and a drop door bottom, a hinge connection between the body anddoor comprising a pair of upwardly tapered vertically disposed spacedrail'members each provided with a longitudinally disposed slot, the baseof the slots being curvilinear to form pintle sockets, straps extendingfrom the door, a pair of spaced rounded pintle members loosely mountedin the straps engageable with the rail slots, the pintle members beingof a diameter approximately equal to the width of said slots wherebyside play between the hinge members is eliminated.

3. The combination with a dump wagon having a body, wheels and a dropdoor bottom, a hinge connection between the body and door comprising apair of vertically disposed bracket members fitted to the outer walls ofthe wagon body, the bracket members each comprising a pair of verticallydisposed projecting rails the companion sides of which are taperedupwardly from a equal to the distance between the outside faces of thecompanion rails at their base portions.

In testimony that I claim the foregoing I have hereunto set my hand atOshkosh in the county of Winnebago and State of Wisconsin in thepresence of two witnesses.

CHARLES G. STREIOH.

Witnesses:

GEO. W. YOUNG, M. E. DOWNEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

